linux-kernel - [PATCH v2] loongarch: fix debugfs_create

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Date:   Sun, 14 May 2023 12:13:46 +0530
From:   mirimmad@...look.com
To:     chenhuacai@...nel.org
Cc:     ivan.orlov0322@...il.com, kernel@...0n.name,
        linux-kernel@...r.kernel.org, loongarch@...ts.linux.dev,
        mirimmad17@...il.com, mirimmad@...look.com,
        skhan@...uxfoundation.org
Subject: [PATCH v2] loongarch: fix debugfs_create_dir error checking

From: Immad Mir <mirimmad17@...il.com>

The debugfs_create_dir returns ERR_PTR incase of an error and the
correct way of checking it by using the IS_ERR_OR_NULL inline function, and
not the simple null comparision. This patch fixes this.

Suggested-By: Ivan Orlov <ivan.orlov0322@...il.com>
Signed-off-by: Immad Mir <mirimmad17@...il.com>
---
 arch/loongarch/kernel/unaligned.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/loongarch/kernel/unaligned.c b/arch/loongarch/kernel/unaligned.c
index bdff825d2..85fae3d2d 100644
--- a/arch/loongarch/kernel/unaligned.c
+++ b/arch/loongarch/kernel/unaligned.c
@@ -485,7 +485,7 @@ static int __init debugfs_unaligned(void)
 	struct dentry *d;

 	d = debugfs_create_dir("loongarch", NULL);
-	if (!d)
+	if (IS_ERR_OR_NULL(d))
 		return -ENOMEM;

 	debugfs_create_u32("unaligned_instructions_user",
--
2.40.0